@misc{indiciae1bf36348d09f,
  title = {Introduction},
  author = {Blair, J. C. and Geissler, E. D. and Mc Donough, G. F. and Murphree, W. D.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700019951},
  note = {Source identifier: 19700019951}
}